FTS SDI-RAINE-HYDRO, Руководство пользователя

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SDI-12 commands always start with the address of the appropriate sensor. Therefore all other sensors on the
same bus will ignore these commands. SDI-12 commands end with ‘
! ’. All answers from sensors start with its
address, too, but end with the ASCII characters ‘Carriage Return’ <CR> and ‘Line Feed’ <LF> .
The SDI-12 protocol is based on the ASCII character set. The baud rate of the SDI-12 protocol is 1200 Bd and
has the byte frame format:
1 start bit
7 data bits (least signi fi cant bit transmitted fi rst)
1 parity bit (even parity)
1 stop
bit.
Acknowledge Active - a!
This command ensures that the sensor responds to requests from the master. Basically it asks the sensor to
con
fi rm it is connected to the bus.
The sensor returns its address and <CR><LF> .
Syntax
Command Answer
a! a<CR><LF>
a – Sensor address a – Sensor address
! – End of command <CR><LF> – End of answer
Example:
Command Answer
0! 0<CR><LF>
1! 1<CR><LF>
Send Identi fi cation - a I !
The command a I ! is used to ask the sensor for its model number and fi rmware version.
Syntax
Command Answer
aI! a 13LMGmbH1515184x1.0781129.0001<CR><LF>
a – Sensor address a – Sensor address
I – Command ‘Send Identi fi cation’
13LMGmbH1515184x1.0781129.0001
13 – 2 characters SDI-12 version-No.
13 = version 1.3
LMGmbH15 – 8 characters manufacturer’s
name (= Lambrecht meteo
GmbH)
15184x – 6 characters sensor type
(= precipitation sensor rain[e] )
1.0 – Sensor version (= version 1)
781129.0001 – 11 characters serial No.
! – End of command <CR><LF> – End of answer
Example:
Command Answer
0I! 013LMGmbH1515184x1.0781129.0001<CR><LF>
1I! 113LMGmbH1515184x1.0781129.0002<CR><LF>
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SDI-RAINE-HYDRO
USER MANUAL
700-SDI-RAINE-HYDRO Rev1 03 Mar 2021
Part# 21184